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1∶2.5万地球化学测量在青海马里木吾卡地区找矿中的应用

Application of 1∶25 000 geochemical survey to ore prospecting in Malimuwuka area of Qinghai

  • 摘要: 青海省都兰县马里木吾卡地区地表存在大量风成沙,为避免影响,选择1∶2.5万地球化学测量方法进行化探扫面工作,采样点密度为20~32点/km2,采样介质为棱角分明的岩屑物质、中粗粒砂和残坡积物,采样粒度为-10目至+60目。通过元素含量、富集离散及组合特征的分析,圈定了6处综合异常,并确定1处找矿远景区。实践表明,1∶2.5万地球化学测量方法在东昆仑高寒高原景观区的勘查中具有较好的应用价值。

     

    Abstract: In light of the fact that large amounts of aeolian sands exist on the surface of the Malimuwuka area in Dulan County,Qinghai Province,1∶25 000 geochemical survey was selected for early geochemical exploration to avoid its influence.The sampling point density was 20~32 points/km2.The sampling medium is sharp-cut rock debris material,medium coarse sand and remnant slope wash.The sampling granularity is -10 mesh to +60 mesh.Based on the analysis of element content,enrichment dispersion and combination characteristics,6 geochemical exploration anomalies were delineated and 1 prospecting prospect was determined.Practice shows that 1∶25 000 geochemical survey has good application value in the exploration of the alpine plateau landscape in East Kunlun.

     

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